(1) Yes. Under GST, every entity shall take GST registration in each State from which it makes taxable supplies. However, a single registration can be taken for all your SEZ units within a State, whether located in one SEZ or more than one SEZ.
(2) A person having unit(s) in a Special Economic Zone as well as outside the SEZ in a State shall make a separate application for registration for SEZ unit(s) as a business vertical distinct from his other units located outside the Special Economic Zone in that State (Refer Rule 8(1) of CGST Rules, 2017).
(FAQ 14: IT/ITES)